“An Inconvenient Sequel” is among the most controversial and polarizing titles of the year. Because of the politics surrounding Gore and climate change, the film divides men and women, critics and fans, and even people who saw the movie and people who are just rating it.

Gore is a capable documentarian, but he’s also a guy for whom 51 million Americans voted and 50.4 million other Americans voted against1 that one time. Climate change is equally divisive. And those politics...